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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e05f441a36e210dda21217dc8ae45233d635b8dee4612cc45b29c4edd960307' 
  AND token = 'e4AUwH8wRUcOgL56zpuV7Hmu32LdzNmsjiIV2IJMNGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}